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A) Object-oriented paradigm. That is, people's legendary thoughts. Encapsulation, inheritance and polymorphism, in my opinion, are slightly higher than if, for, etc., which are also grammatical problems. The three principles to master in object-oriented programming are Plato principle, Liskov substitution principle and Parnas principle. These three principles are actually very simple. Any principle that you find difficult to fall in love at first sight and quickly identify with is not a good principle.Villagers: At that time, the monthly salary was more than 7,000 yuan, which was astronomical for our countryside.该剧通过山西河曲县农民走西口开拓创业的艰辛故事，再现西口汉子们与天灾人祸的抗争，先辈们的生存意志与坚强拼搏的精神。连青木也好奇起来，等着看结果。邹辉是闻名世界的“神枪手”，因痴迷于射击事业，对家人照顾甚少，导致爱妻红杏出墙，因此悔恨不已，并发誓自己和后代不再涉足射击事业。其子邹志军(洪天明饰)，具有射击天赋。在一次“神枪手”射击游戏比赛中，小试枪技，没想到得分成绩远超最好记录，赢得一片喝彩，其父的态度也开始转变。一日，邹志军偶遇绑劫案，劫匪持枪劫持重要人质与警察对持,邹志军在混乱中拾得一把枪，毫不犹豫抬手一枪击毙劫匪，令在场所有人为之惊叹不已，邹志军因此英名远扬，但此时一个阴谋也因他而产生，突如其来的事件令这位天生“神枪手”陷入了一个个危险的境地……